DUBLIN—Ireland will likely sign up to an overhaul of global corporate tax rules if certainty is brought to bear on its concerns when an updated text of the OECD’s proposals is published shortly, Finance Minister Paschal Donohoe said on Thursday. Ireland, the low-tax European headquarters for a number of the world’s largest multinationals, has so far declined to sign up to an Organisation for Economic Co-operation and Development agreement struck by over 130 of 139 negotiating countries. The EU member state has focused its criticism on a proposed minimum rate of “at least” 15 percent, saying the inclusion of the phrase “at least” would undermine the certainty it has given to companies for decades to make long-term investment decisions. Ireland’s corporate tax rate of just 12.5 perc has helped attract the likes of Google, Facebook and Apple to the country and foreign multinationals now directly employ more than one in …